Lean-fuel gas turbine engine

Abstract

Provided is a compact lean-fuel gas turbine engine which does not cause performance degradation of the engine or pressure loss in the exhaust system, which comprises a compressor (1) for compressing an operative gas (G1) to generate a compressed gas (G2), the operative gas (G1) having a concentration of burnable component which is less than a flammability limit thereof, a catalytic combustor (2) for combusting the compressed gas (G2) by a catalytic reaction with an aid of a catalyst accommodated therein to generate a combustion gas (G3), a turbine (3) adapted to be driven by the combustion gas (G3) supplied from the catalytic combustor (2), a regenerator (6) for heating the compressed gas (G2) supplied from the compressor (1) to the catalytic combustor (2) by an exhaust gas (G4) supplied from the turbine (3) through an exhaust gas passage (25) to the regenerator (6), a burner (7) for burning a gas (G20) extracted from the compressor (1) with a fuel to generate a heating gas (G5) and supplying the heating gas (G5) into the exhaust gas passage (25) and a valve (8) for controlling an amount of the extracted gas (G20) to be supplied to the burner (7).

Dependencies are inferred from the claim text.